Heater for printing presses



Feb. 23 1926.

- c. BRADLEY HEATER FO R PRINTING PR ESSES 2 Sheet s-Shaet 1 Filed Feb. 2'7, 1925 4L 1 INVENTOR.

Cfinr/es firad'y ATTORNEY.

Feb. 23 ,1926. C. BRADLEY HEATER FOR PRINTING PHESSES Filed Feb. 27, 1925 2 Shasta-Sheet 2 INVENTOR.

C/Eavles Bra ATTORNEY.

Patented Feb. 23, 1926.

UNITED STATES CHARLES BRADLEKOF LOS ANGELES, CALIFORNIA.

HEATER FOR PRIN'IIHG PRESSES.

Application filed February 27, 1925. Serial No. 11,963.

To all whom it may concern Be it known that I, CHARLES BRADLEY, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Heaters for Printing Presses, of which the following is a specification.

It is the object of this invention to provide a heater for a printing press which is automatically controlled; and more particularly to provide a heater which is shut off or turned-on by the tripping and release of the press.

It is a further object of the invention to provide a heater adapted for removable mounting at the cylinder of a press and forming a support for the sheet guard sticks of the delivery merchanism, whereby said sticks may be readily removed when changing from face-up to face-down delivery.

It is a still further object of the invention to provide sheet guard sticks which may be quickly adjusted relative to the delivery tapes of the press.

It is a still further object of the invention to provide a heater comprising a plurality of gas burners. having a valvular control for the fuel supply which is operated by movement of the trip lever of the press.

It is a still further object of the invention to provide a guard for the burners of the heater adapted to protect the printed sheets and also prevent extinguishing of the burners by the formation of air pockets.

Further objects of the invention will be readily understood from the following description of the accompanying drawings in which:

Fig. 1 is a perspective view showing the heater mounted upon a press. 7

Fig. 2 is a vertical section through the platform of the press, showing the pedal for the trip lever locked in depressed position.

Fig. 3 is a perspective view showing the operating mechanism for the fuel valve of the heater.

Fig. 1 is a perspective view of the heater showing a sheet guard stick mounted thereon.

The heater is illustrated as mounted upon a usual two-revolution cylinder press, which includes the cylinder 1 mounted in the side frames 2, with strippers 3 adapted to pass the printed sheets onto the tapes at of the delivery mechanism, the press being ar-= ranged for face-up delivery. 1 Usual brackets 5 for the supporting rod or the sheet guard sticks, are mounted in front of the cylinder and above the delivery mechanism ona transverse rod 6.

Thetrip mechanism adapted to permit reciprocation of the bed without contact of the printing form with the cylinder, is shown as including operating shaft 7 extending transversely of the press frame, and trip lever 8 having a bearing thereof fixed on the end of shaft .7 by a set'screw 9. The trip lever is normally elevated by a spring 10 for releasing the trip and permitting normal operation of the press,and is depressed by a foot pedal 11 for tripping the press.

The foot pedal is connected to the trip lever by the link 12 extending through a slot 13 in the platform 14; and the, pedal may be locked in depressed position, by 1 shifting the same laterally so that link 12 extends through a slot 15 in the platform with shoulders 16 on said link engaged beneath the sides of said slot.

The improved heater is illustrated as a burner pipe 17 adapted to extend across the press in front of the-cylinder, the pipe having a plurality of gas-burner apertures 18 in its outer face and adjacent its lower side. A shield or baffle strip 19 preferably extends forwardly under the pipe in spaced relation below the burner openings, so as to protect the printed sheets as they are delivered under the heater to the tapes 4,

and also prevent extinguishing of the.

burners by the formation of air pockets. 7

Pipe 17 is removably mounted on the press by supporting the same in the brackets 5 from which the usual rod for the sheet guard sticks has been removed, the pipe being of a cross-sectional contour adapting the searne for ready reception in the brackets and being held in place by the usual set screws 20 so as to permit quick removal thereof. The sheet guard sticks 21 are mounted upon the burner pipe by clamps 22, which are readily detachable from the pipe and held in place by set screws 23. The clamps-22 extend over the top of the burner pipe, out of the way of the burner openings adjacent the lower side of the pipe, and the sheet guard sticks are hinged to said clamps as shown at 22 so that they may be adjusted up and down relative to the printed sheets on the tapes of the delivery mechanism.

Gas is supplied to pipe 17 at the feeder side of 'the'press, and the pipe is closed at its opposite end by a cap. An air mixer v25 is provided in the gas pipe and is regulated air mixer for turning the gas on or off.

A "tube 31 leads from the casing 29 and I along the pipe 17 to the burners, where it forms a pilot burner 32 shielded by a guard 33 on the burner pipe; The supply of fuel through this pilot tube is regulated by a valve in casing 29 having a manually .operated control 34, v

, Stop-cock is opened and closed by a usual rotatable plug 35 which is turned by the "tripping and release of the press, so

' that the burners are lighted during normal operation of the press with thetrip released, and are extinguished when the press is tripped.

' The operating connection for turning plug 35 is shown as a rod 36 having a bearing 37 swiveledto its upper end, with a screw 38 threaded through said bearing and into a transverse socket 39in the head of the plug. The lower end of rod 36 is pivoted to a forked arm 40, which is threaded at its opposite end as shown at 42, so that it may be screwed into a threaded recess tapped in the end of the set screw 9 which fixes the trip lever 8 on shaft 7 The pivotal connection between arm40 and the rod 36 is preferably adjustable along the latter as shown at 41, to adjust the mechanism to the size of the press. H V

By the construction as thus described, elevation of trip lever 8 to its normal position, swings arm 40 downwardly so as to depress rod 36 and thus turn plug 35 to open position for burning of the heater; and tripping of the press by depression of lever 8, swings arm 40 upwardly and thereby elevates rod: 36 so as to turn plug 35 to; closed position and thusextinguish the burners. Lever 8 being held in depressed position by the shoulders 16 of the link12, the burners remain extinguished as longas the press is tripped; and when the trip is released the opening 0 stop-cock 3O permits the pilot 32 to relight the burners, for operation of the heater throughout normal operation of the press and until the lever 8 is again depressed for tripping the same.

I claim: 4 p

1. A heater for a printing press having a trip mechanism said heater having a control, and means for operating said control adapted for connection to the trip mechanism of the press so as to shut-off .an.droperate said heater when the press is tripped and released respectively.

2. A heater for a printing press having a trip shaft, a trip lever, and a set screw for fixing the trip lever on the trip shaft; said heater having a control and means for operating said control adapted for connection with said set screw so as to shut-oft and operate the heater by movement of the trip lever in opposite directions for tripping the press and releasing the same respectively.

3. A heater for the cylinder of a press which is provided with brackets for a sheet guard stick rod; comprising a burner pipe adapted to be supported in said brackets, and sheet guard sticks mounted on said burner pipe.

4C. The combination of a heater for a press comprising a burner pipe extending across the press in front of and above the cylinder thereof, and sheet guard sticks detachably fixed on said burner pipe.

5. A sheet guard for the delivery mechanism of a press comprising a support, and a sheet guard stick movably connected thereto for adjustment of said stick relative to the delivery mechanism.

6. The combination of a heater for a press comprising a burner pipe extending across the press in front of and above the cylinder thereof, said pipe having burner apertures in its front and adjacent its lower side, and clamp supports for sheetguard sticks detachably fixed on the upper'side. of said burner pipe.

7. A heater for a printing press comprising a burner pipe arranged for passage of the printed sheets beneath the burner pipe, and sheet guard sticks carried by the burner pipe and projecting therefrom so as to overlie and prevent displacement of the printed sheets.

In testimony whereof I have affixed my f signature to this specification.

CHARLES BRADLEY. 

